Plaster-cast-cutting machine



May 14, 1929. G. BoGGlo PLASTER CAST CUTTING MACHINE Filed Sept. 9,1926. 2 Sheets-Sheet l INVENTOR ATTORNEY WITNESS:

May 14, 1929. G, BoGGlo I PLASTER CAST CUTTING MACHINE Filed sept. 9,192e 2 Sheets-Sheet 2 www 53j@ EY u `INVENTOR Patented May 14, 1929.

L. @UNITED sTATEsPATENT OFFICE.

f vantages lin view,

GIUsTo BoeGIo, or RoYALToN, ILLINOIS.

PLASTBfCAST-CUTTING MACHINE.

VApplication illed September 9, 1926. Serial No. 134,587.

This invention relates to surgical implements, particularly to sawsorcutters, and has for its object the provision of a novel device bymeans of which plaster casts about broken limbs or other parts of thebody ma be quickly and easily cut to facilitate or e fect removalthereof, the device being intended principally for use sicians, hospitalattendants and others having occasion to employ it.

An important object is the provision of a device of this character which`is electric motor operated and which will operate with considerablepower and efficiency for carrying out the purpose for which it isintended.

Another object is the provision of a device of this character providedwith means for easily regulating the depth of the cut made bythe rotarysaw. ,y

Another object is to provide a deviceiof this character in l which thecover section carrying the motor is removable from the main orv bodyportion of the device so as to facilitate access to the motor for theurpose of oiling or making any repairs w ich may be necessary.

` n additional object is the provision of a device' of this characterwhich will be .comparatively simple Vand( inexpensive in manufacture,easy to use, efficient and convenient in action, durable inservice, anda general improvement in the art.

With the above andY other objects and adthe invention consists in thedetails of construction,` thel combination and arrangement of parts tobe hereinafter more fully described and claimed, and illustrated in theaccompanying drawings, in

which Figure 1 is a side elevation of the device. Fi re 2 is a verticallongitudinal sectiona view, taken on the line 2 2 of Figure 3 Figure 3is a cross sectional view taken on the line 3 3 of Fi re 1.

Figure 4 is a detai line 4 4 of Figure 3.

Figure 5 is a detail section taken on the line 5 5 of Fi re 2.

Figure 6 is agttom plan view ofthe cover removed from the main or bodyportion of the device.

Figure 7 is a side elevation of the device, with a part broken away andin section, and showing the action of the adjusting means, and

y a casing designated as by surgeons, phyY sented the securing Ymeans ascom section taken on the 30 Figure 8-is a fragmentary View taken on thel1n`e 8 8 of Figure 1.

Referring more particularly to the drawi ings, I have shown the deviceas com rising a whole by die numeral 10, this casin being of. anydesired size and shape as wel as material and finish. In the presentinstance the casing is shown as including side portions 11 and 12V andforward and rear end ortions 13 and 14 respectively. The top of) thecasing is open and normally closed by a casing section 15 which isformed with or secured to a to P member 16, the members 15 and 16togetherconstituting a closure for y the easing. Any suitable means maybe ro: vided for holding the section 15 in p ace though in the presentinstance I have repreprising the rethe entire top of suitable screws17passing through movable section and threaded into suitable bosses 18within the casing 10.

Suitably secured to the underside of the section or top member 15 is anelectric motor 19 of suitable power having its shaft 2O carrying a spurgear 21 adapted to mesh with a large spur gear 22 journaled on a stubshaft 23 .carried by the side wall v1 2 of the casing. J ournaledtransversely through the lower portion of the casing isa shaft 24 onwhich is mounted a pinion 25 meshing with the spur gear 22 and on whichis'also mounted and held, as b Aa set screw 26 a circular saw 27 whichis ocated within the confines of a housing 28 secured upon thesiderwall12, this housing acting as a vprotective shield for the saw durin therotatlon thereof.

In order that ieftop section 15 may be detached from the main casing 10,carr ing with it the motor 19, the upper edge o the wall 12 is shown asprovided `with a notch or opening 29 which accommodates the hub of thespur gear 21.

Suitably secured to the rear end wall 14 of the casing is a hollowhandle structure which is slotted at its upper portion, as shown at 3lto provide or permit access to a handle 32 of a switch 33 mounted withinthe handle and connected with the current carrying Wires 34 which leadfrom any suitable source of current to the motor 19. By operating theswitch handle 32, it is uite clear that the motor may be energize ordeenergized at will. The exact details of construction of the switch arenot given inasmuch as it may be any one of a number 2 Y w l 1,713,368

.bottommember being suitably hinged lat 36 at the forward end of thecasing and having its rear end formed withan upward extension 37 slottedat 38 for the accommodationot a clampingscrew 39 which pro- .jects fromthe rear wall 14 and which carries 1a screw L10. l

In the roperation ofthe device,it will be apparent that 'by looseningthe nut 40 the bottom memberV may be adjusted either upwardly ordownwardly, as the `case may be,-so as to vary the degree of projectionof the saw beyond it so that the cnt or depth of-cut ymade by 'the' sawmay be -easily regulated. -Of course, after the proper adjustment isfound, the'nut 40 should be tightened to maintain the parts in thisposition.

" VVheneverV it is desired to cut a plaster cast or the likeindicated atA, the operator takes the device -by the handle 13 and places it inpositionupon the plaster cast and operates the switchl to-energize themotor. When the motoris in action litis of course apparent lthat the-gearing "interposed Vbetween its shaft andthe shaft twill operate torotate the saw 27 at high speed, this saw acting to cutaway the plastercast as indicated at B. 'V After'the casthas been cut 'nearly through,it is a simple matter -to 'break it along the line vot" sawing or -cutit by'soine other man ner so that it may be quickly and easily re- Ymoved and without danger of injury to the patient.

"It orany reason it is necessary to repair or oilthe motor, the screws17 may be removed andthe section 15 carrying the plate member 16removed', the motor coming along withv it. This vinside AView of the topmember is disclosed in VFigure 6. When this has been done-it is' ofcourse apparent that access is readily had to the motor for the purposeof making any repairs or adjustment thereto. It is really believed `thattheconstruction, operation and .advantages will be l readily apparent toone skilled in the art without further explanation.

IlVhile I haveV shown and preferred `embodiment of the invention, itshould be understood that I reserve the right to. make such changes inthe form,

construction, and arrangement of parts as willfnot depart from thespirit of the invention or'the scope of the .-subjoined claims IVhatIclaim is:

1. A plaster cast cutting machine comprising a. casing provided with ahandle, a removable top `section for the -casing,1an electric motorsecured to Aand depending from the top section, the bottom sectionhaving one side wall provided 4with a notch ifor the accommodation ofthe motorshaft, ,-a drive pinion on the Vmotor shaft located within thecasing, a ycircular saw journally supported by lthe casing, -and a trainof gears permanently located within the casing and connecting the saw4with Lsaid drive pinion. Y

2. A plaster cast cutting machine `comprising =a casing provided with-anV operating handle, a power mechanism located withinthe casing, a`rotary saw Vjournally supported bythe 'casing at one side thereof andprojecting beyond the' bottom edge, transmission mechanism between saidpower mechanism and the saw for Veffecting-rotationof thelatter, andanadjustablyfmounted bottom member for the casing lacting ras Aa guide'orstop to adjust the depth of vcnt made by the saw, said member "beingpivoted at its forwardl endto'the casing and having its rea-'r fendAformed "with an 11,p'V

wardly extending portion havingV a slot therein, and a clamping membercarried by the casing and passing through ,said slot for securing the'hinged .bottom member in adjusted position. Y I

Y In testimony whereof I affix mysignature. Y

'Gi-Us'ro Bodem'.

described the y

